Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7663286 | Commutator motor with brush biased toward initial contact side | Toshihiko Muramatsu, Yukio Inuzuka, Masashi MIYAMOTO | 2010-02-16 |
| 7586230 | Brush, commutator, and commutator device | Hirotake Hamamatsu, Youichi Murakami, Kenzo Kiyose, Mitsuo Ikeda, Yoichi Sakaura +2 more | 2009-09-08 |
| 7067951 | Copper-graphite brush | Takayoshi Otani, Masakiyo Shimada, Hirotada Kanagawa, Yukinobu Isoda, Kyoji Inukai +3 more | 2006-06-27 |